Vacuum cleaner



FIG. 1 is a perspective view of a vacuum cleaner showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a top view thereof.

The broken line showing of the bottom and various portions of the vacuum cleaner is for environmental purposes only and forms no part of the claimed design. 

CLAIM The ornamental design for a vacuum cleaner, as shown and described. 